Fartlek sounds like a usual name, but actually, it is one of the most efficient methods for increasing speed and endurance without turning your training into a guilty ordeal. It combines elements of ...

Hearing about a workout called a “fartlek” for the first time as a new runner might be intimidating and confusing. That’s because most terms, like “long run” and “speed workout,” are pretty ...

If you’ve resolved to get more fit in 2025, you’re in luck, because almost any exercise will steer you toward that goal. But of all your exercise options, few will be as effective, simple, adaptable ...

Beth Skwarecki is Lifehacker’s Senior Health Editor, and holds certifications as a personal trainer and weightlifting coach. She has been writing about health for over 10 years. Fartleks are a ...

There seems to be a new walking workout trend doing the rounds on a weekly basis, so much so that it can be a challenge to keep up. With the Japanese interval walking method, the 12-3-30 walking trend ...